Wider bars give you greater leverage, but it's a personal thing. Not everyone finds the wide bar trend to work for them. You could slide your brake levers, shifters and grips inwards about a half inch and try riding that way for a while. Keep doing so until you find your best position, then hack away.

Before I go cutting......

With wider bars, you will want to set up your whole cockpit a bit shorter than you may have previously. Get slightly more upright, less over the bars. Might help you like it before you decide you don't.

I've had pretty wide bars, almost 700. And my current ones are really short (Cheap ebay carbon). Somewhere around 600. I actually am liking the shorter ones for what it's done to the handling when ripping single track. Not as easy to overshoot a fast corner or pick a line in a split second... However I enjoyed the control and sense of leverage in the snow and such in the winter. I'll likely be putting the longer bars back on in winter.

There is a trade off. Wider = slower, but with greater leverage. It takes a longer swing of the hands to get the same change in steering angle. This can be great if your bike is twitchy by nature (most aren't these days). In soft conditions, the extra leverage can be helpful. So too does that leverage tend to dampen the shock of rough terrain. To the bad, you have to be more careful in narrow clearance situations.

Clipping a bar on a tree is not a good idea. Nasty crashes sometimes. I have been transitioning to longer bars for a while. I used to ride 25" riser bars, but switched to 27", which took a while. No way I could go much wider around here without either stopping a lot or cutting some trees down. I need to be conscious on trails I've ridden often because muscle memory has me clipping these wider bars if I'm not careful. I have On One Mary's on all of my bikes now, at 660mm. I still get reminded with the occasional ding off the end of the bar cap.

I also suggest you play with the cockpit length and width before cutting. Like "learning" to ride a Fatty, you have to get used to the self steer and ride characteristics that you now likely don't even notice any longer (I don't). To give it a proper go, you need to work past your subconscious predilection for your old setup. You still may not prefer them in the end, but if you don't try it you may never learn that wider bars actually work better for you. Been there!

Most people ply the Well Trodden Path. A few seek a different way, and leave a Trail behind.
- John Hajny, a.k.a. TrailMaker

Thanks for responses. Realised this morning that with hands wider I am leaning forward more so as suggested need to play with cockpit setup perhaps. Fatty handlebars are 810 mm wide. Might swap the DH riser bars onto it. Still plenty of width and will get me a bit mroe upright.